Capybara (web testing framework) Developer Hiring Guide

Hiring Guide for Capybara (web testing framework) Engineers

Ask the right questions to secure the right Capybara (web testing framework) talent among an increasingly shrinking pool of talent.

Capybara is a web-based testing framework that simulates how a user interacts with your application. It is written in the Ruby programming language and integrates seamlessly with popular testing frameworks like RSpec, Cucumber, Test::Unit, and Minitest. Capybara helps you test web applications by simulating how a real user would interact with your app. It can handle complex actions such as filling out forms or clicking buttons and links, making it an essential tool for behavior-driven development (BDD) and acceptance testing. Capybara supports multiple web drivers like Selenium, Rack-Test, and Webkit to simulate browser interactions.

First 20 minutes

General Capybara (web testing framework) knowledge and experience

The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.

Describe the difference between 'find' and 'first' methods in Capybara.

'Find' will raise an error if the element is not found, while 'first' will return nil.

What are the different drivers available in Capybara?

Capybara supports several drivers such as Rack::Test, Selenium, and Capybara-WebKit.

How would you use Capybara to fill in a form?

You can use the 'fill_in' method to fill in a form. For example, 'fill_in 'Name', with: 'John Doe''.

What are the main features of Capybara?

Capybara provides a high-level API to interact with web-based applications. It supports multiple drivers, handles asynchronous JavaScript, and can match on page content.

How would you install Capybara?

You can install Capybara by adding 'gem capybara' to your Gemfile and running 'bundle install'.

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What youre looking for early-on

Can the candidate communicate effectively about technical concepts?

This is crucial as it shows that the candidate can explain their work and ideas to both technical and non-technical team members.

Does the candidate have experience with test-driven development?

This is important because Capybara is a testing framework, and experience with test-driven development can be a strong indicator of success.

Has the candidate shown an ability to work as part of a team?

Software development is often a collaborative effort, so it's important that the candidate can work well with others.

Is the candidate familiar with Ruby, the language that Capybara is written in?

Understanding Ruby is essential for a Capybara developer as it is the base language of the framework.

Has the candidate demonstrated problem-solving skills?

This is important because a developer often needs to troubleshoot and solve problems that arise during the development process.

Does the candidate have a solid understanding of Capybara and its applications?

This is crucial as it shows that the candidate has the necessary knowledge and skills to use the framework effectively.

Next 20 minutes

Specific Capybara (web testing framework) development questions

The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.

Describe the difference between 'have_content' and 'have_text' matchers in Capybara.

'Have_content' and 'have_text' are essentially the same, they both check if the page or element has the specified text.

What are the different ways to navigate to a page in Capybara?

You can use 'visit' to navigate to a specific URL, or 'click_link' to navigate via a link.

How would you use Capybara to test a JavaScript alert?

You can use the 'accept_alert' method to test a JavaScript alert. For example, 'accept_alert do click_link 'Show Alert' end'.

What is the use of 'within' method in Capybara?

'Within' method is used to scope the interaction with the page to a specific element.

How would you handle asynchronous JavaScript with Capybara?

Capybara has built-in support for asynchronous JavaScript, it will automatically wait for AJAX requests to complete.

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The ideal back-end app developer

What you’re looking to see on the Capybara (web testing framework) engineer at this point.

At this point, a skilled Capybara engineer should demonstrate proficiency in Ruby programming, understanding of web development concepts, and expertise in creating effective testing strategies. Red flags include lack of practical experience, inability to troubleshoot issues, and poor understanding of web technologies like JavaScript, CSS, and HTML.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Capybara (web testing framework).

What does the following Capybara code do?

visit '/login'
fill_in 'Username', with: 'user1'
fill_in 'Password', with: 'password1'
click_button 'Login'

This code navigates to the '/login' page, fills in the 'Username' and 'Password' fields with 'user1' and 'password1' respectively, and then clicks the 'Login' button.

What will be the output of the following Capybara code?

visit '/home'
find('li#menu').click
expect(page).to have_content 'Welcome'

This code navigates to the '/home' page, clicks on the element with id 'menu', and then checks if the page contains the text 'Welcome'. If the text is present, the test will pass, otherwise it will fail.

What does the following Capybara code do?

all('.item').each do |item|
  item.click
end

This code finds all elements with the class 'item' and clicks on each one of them.

What does the following Capybara code do?

using_wait_time(5) do
  click_link 'More Info'
end

This code sets the maximum wait time to 5 seconds for the 'click_link' action. If the link 'More Info' is not available within 5 seconds, Capybara will throw an error.

What does the following Capybara code do?

class LoginPage
  include Capybara::DSL
  def login(username, password)
    fill_in 'Username', with: username
    fill_in 'Password', with: password
    click_button 'Login'
  end
end

This code defines a class 'LoginPage' that includes the Capybara DSL. The class has a method 'login' that takes a username and password, fills in the 'Username' and 'Password' fields with these values, and then clicks the 'Login' button.

What will be the output of the following Capybara code?

visit '/home'
within('#header') do
  expect(page).to have_content 'Welcome'
end

This code navigates to the '/home' page and then checks if the element with id 'header' contains the text 'Welcome'. If the text is present, the test will pass, otherwise it will fail.

Wrap-up questions

Final candidate for Capybara (web testing framework) role questions

The final few interview questions for a Capybara (web testing framework) candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.

How would you configure Capybara to use a different driver?

You can configure Capybara to use a different driver by setting 'Capybara.default_driver'. For example, 'Capybara.default_driver = :selenium'.

What are the different ways to debug in Capybara?

You can use 'save_and_open_page' to open the current page in the browser, or 'puts page.html' to print the HTML of the current page.

How would you use Capybara to test a modal dialog?

You can use the 'within' method to scope the interaction to the modal dialog. For example, 'within '.modal' do ... end'.

What is the use of 'save_and_open_page' in Capybara?

'Save_and_open_page' is used to save and open the current page in the browser for debugging.

How would you use Capybara to interact with a dropdown menu?

You can use the 'select' method to interact with a dropdown menu. For example, 'select 'Option', from: 'Dropdown''.

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Capybara (web testing framework) application related

Product Perfect's Capybara (web testing framework) development capabilities

Beyond hiring for your Capybara (web testing framework) engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Capybara (web testing framework) projects, and can engage in multiple capacities.

Capybara (web testing framework) Consultive assessments

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